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SSC CGL Mixture and Alligation — practice questions — page 2

Explore 53 free Mixture and Alligation questions in SSC CGL Quantitative Aptitude. Open each question or exercise to read its content, reference answers and available explanation.

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Mixture and Alligation questions and exercises with answers

Showing questions 31–53 of 53.

A dealer buys milk at Rs 20/L and adds water so the mixture costs Rs 16/L. Water per litre of milk?Read the answer and worked solution →Sugar at Rs 44/kg is mixed with 20 kg at Rs 32/kg to give a blend at Rs 36/kg. How much Rs 44 sugar?Read the answer and worked solution →Alloys of copper and tin in the ratios 3:2 and 1:4 are melted in equal weights. Copper to tin?Read the answer and worked solution →A 16 kg alloy has zinc and copper in the ratio 5:3. How much zinc must be added to make it 3:1?Read the answer and worked solution →From 100 L of 30% acid, 20 L of the solution is removed and replaced by water. Acid left?Read the answer and worked solution →A 60 L can of pure milk has 6 L replaced by water each time, three times in all. Milk left?Read the answer and worked solution →A 32 L vessel of pure liquid has 8 L replaced by water, twice. Pure liquid to water at the end?Read the answer and worked solution →A chemist mixes 4 L of a 15% solution with 6 L of a 25% solution. Strength of the mixture?Read the answer and worked solution →How many litres of 90% acid should be added to 30 L of 60% acid to get a 70% mixture?Read the answer and worked solution →To 40 L of a 25% solution, how much pure solute must be added to make it 50%?Read the answer and worked solution →Pure water is added to a 15% solution to get 12%. What is the solution to water ratio?Read the answer and worked solution →A 20 kg salt solution contains 2 kg of salt. What is its percentage strength?Read the answer and worked solution →30 kg of flour at Rs 9/kg is mixed with 20 kg at Rs 14/kg. What is the price per kg of the mixture?Read the answer and worked solution →A shopkeeper mixes 15 kg of lentils at Rs 28/kg with 25 kg at Rs 36/kg. Cost per kg of the mixture?Read the answer and worked solution →Oil at Rs 120/L and Rs 160/L is mixed in the ratio 2:3. Find the price of the mixture per litre.Read the answer and worked solution →How much flour at Rs 8/kg must be mixed with 30 kg at Rs 14/kg to get a blend at Rs 12/kg?Read the answer and worked solution →Boys average 60 kg and girls 50 kg; the class average is 56 kg. What is the boys to girls ratio?Read the answer and worked solution →30 students average 40 marks and another 20 average 65 marks. Find the combined average.Read the answer and worked solution →20 boys average 15 years and 30 girls average 20 years. What is the average age of all 50?Read the answer and worked solution →A seller mixes water with milk costing Rs 30/L and sells at Rs 30/L. If 1 L of a 5 L mix is water, profit?Read the answer and worked solution →A 24 L mixture has milk and water in the ratio 5:3. How much milk is in it?Read the answer and worked solution →How much water is in 50 L of a milk and water mixture where milk to water is 7:3?Read the answer and worked solution →A 40 L vessel of pure milk has 10 L removed and replaced by water. What is the milk to water ratio?Read the answer and worked solution →

Worked practice questions

A dealer buys milk at Rs 20/L and adds water so the mixture costs Rs 16/L. Water per litre of milk?

  1. 0.5 L
  2. 0.4 L
  3. 0.2 L
  4. 0.25 L
Show answer and solution

Correct answer: D. 0.25 L

Milk : water = (16 - 0):(20 - 16) = 4:1, so 0.25 L of water goes with each litre of milk.

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Sugar at Rs 44/kg is mixed with 20 kg at Rs 32/kg to give a blend at Rs 36/kg. How much Rs 44 sugar?

  1. 8 kg
  2. 10 kg
  3. 12 kg
  4. 15 kg
Show answer and solution

Correct answer: B. 10 kg

Rs 44 : Rs 32 = (36 - 32):(44 - 36) = 4:8 = 1:2, so the Rs 44 sugar is 10 kg.

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Alloys of copper and tin in the ratios 3:2 and 1:4 are melted in equal weights. Copper to tin?

  1. 2:3
  2. 3:2
  3. 1:2
  4. 3:4
Show answer and solution

Correct answer: A. 2:3

Copper is (3/5 + 1/5)/2 = 2/5 of the alloy and tin is 3/5, so the ratio is 2:3.

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